So instead of downing a gallon of Breyer's the next time you're feeling down or stuffing yourself with leftover danishes from the break room before that big presentation at work, next time, give your body the fuel it needs.

Here's Why: A study in Finland found that people who eat more fish are 31 percent less likely to suffer from depression. And skip sweet, simple carbs—the inevitable sugar crash can actually deepen depression.

Here's Why: Chocolate contains a host of chemicals to brighten your mood, Somer says, including anadamine, which targets the same receptors as THC, and phenylethylamine, which produces a cozy, euphoric feeling.

ConfusionThe Situation: You've forgotten your last two deadlines.

Your Meal: Pineapple chunks for a snack or a cup of berries in your oatmeal

Here's Why: Antioxidants from the most-colorful fruits and vegetables help pick off the free radicals that wear away at your memory. "Because your brain consumes so much oxygen, oxidants do heavy damage there," says Somer.